The Evo will be my first smart phone, and I had some maintenance questions. I'm not used to a battery-intensive phone... I've heard you are supposed to drain the battery on day one and then charge fully. Anything else we should be doing to keep our Evos working like new? Charge every night? Only when the battery gets low? etc. Are there anti-virus programs for Android phones? Any problem with keeping it on all the time? Any resource-heavy widgets to avoid? Thanks!